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 #include &lt;QtGui&gt;

 #include &quot;xbelgenerator.h&quot;

 XbelGenerator::XbelGenerator(QTreeWidget *treeWidget)
     : treeWidget(treeWidget)
 {
 }

 bool XbelGenerator::write(QIODevice *device)
 {
     out.setDevice(device);
     out.setCodec(&quot;UTF-8&quot;);
     out &lt;&lt; &quot;&lt;?xml version=\&quot;1.0\&quot; encoding=\&quot;UTF-8\&quot;?&gt;\n&quot;
         &lt;&lt; &quot;&lt;!DOCTYPE xbel&gt;\n&quot;
         &lt;&lt; &quot;&lt;xbel version=\&quot;1.0\&quot;&gt;\n&quot;;

     for (int i = 0; i &lt; treeWidget-&gt;topLevelItemCount(); ++i)
         generateItem(treeWidget-&gt;topLevelItem(i), 1);

     out &lt;&lt; &quot;&lt;/xbel&gt;\n&quot;;
     return true;
 }

 QString XbelGenerator::indent(int depth)
 {
     const int IndentSize = 4;
     return QString(IndentSize * depth, ' ');
 }

 QString XbelGenerator::escapedText(const QString &amp;str)
 {
     QString result = str;
     result.replace(&quot;&amp;&quot;, &quot;&amp;amp;&quot;);
     result.replace(&quot;&lt;&quot;, &quot;&amp;lt;&quot;);
     result.replace(&quot;&gt;&quot;, &quot;&amp;gt;&quot;);
     return result;
 }

 QString XbelGenerator::escapedAttribute(const QString &amp;str)
 {
     QString result = escapedText(str);
     result.replace(&quot;\&quot;&quot;, &quot;&amp;quot;&quot;);
     result.prepend(&quot;\&quot;&quot;);
     result.append(&quot;\&quot;&quot;);
     return result;
 }

 void XbelGenerator::generateItem(QTreeWidgetItem *item, int depth)
 {
     QString tagName = item-&gt;data(0, Qt::UserRole).toString();
     if (tagName == &quot;folder&quot;) {
         bool folded = !treeWidget-&gt;isItemExpanded(item);
         out &lt;&lt; indent(depth) &lt;&lt; &quot;&lt;folder folded=\&quot;&quot; &lt;&lt; (folded ? &quot;yes&quot; : &quot;no&quot;)
                              &lt;&lt; &quot;\&quot;&gt;\n&quot;
             &lt;&lt; indent(depth + 1) &lt;&lt; &quot;&lt;title&gt;&quot; &lt;&lt; escapedText(item-&gt;text(0))
                                  &lt;&lt; &quot;&lt;/title&gt;\n&quot;;

         for (int i = 0; i &lt; item-&gt;childCount(); ++i)
             generateItem(item-&gt;child(i), depth + 1);

         out &lt;&lt; indent(depth) &lt;&lt; &quot;&lt;/folder&gt;\n&quot;;
     } else if (tagName == &quot;bookmark&quot;) {
         out &lt;&lt; indent(depth) &lt;&lt; &quot;&lt;bookmark&quot;;
         if (!item-&gt;text(1).isEmpty())
             out &lt;&lt; &quot; href=&quot; &lt;&lt; escapedAttribute(item-&gt;text(1));
         out &lt;&lt; &quot;&gt;\n&quot;
             &lt;&lt; indent(depth + 1) &lt;&lt; &quot;&lt;title&gt;&quot; &lt;&lt; escapedText(item-&gt;text(0))
                                  &lt;&lt; &quot;&lt;/title&gt;\n&quot;
             &lt;&lt; indent(depth) &lt;&lt; &quot;&lt;/bookmark&gt;\n&quot;;
     } else if (tagName == &quot;separator&quot;) {
         out &lt;&lt; indent(depth) &lt;&lt; &quot;&lt;separator/&gt;\n&quot;;
     }
 }</pre>
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